Finding the Fourth Proportional to 1,870.35, 2,580.26 and 1,123.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.35 : 2,580.26 = 1,123.88 : x
2. Step 2: Convert to fraction form
   1,870.35/2,580.26 = 1,123.88/x
3. Step 3: Cross multiply
   1,870.35x = 2,580.26 × 1,123.88
4. Step 4: Simplify right side
   1,870.35x = 2,899,884.09
5. Step 5: Solve for x
   x = 2,899,884.09/1,870.35
6. Step 6: Final answer
   x = 1,550.45